Re: accordion notation - counter bass note

[Simon Albrecht]

On 13.06.2017 18:51, Gianmaria Lari wrote:
> What's \etc? Any link to this command?

A great, unfortunately yet undocumented new feature. Essentially it’s a 
shorthand notation for defining music functions (and markup commands, 
IIRC) without using scheme syntax. Bogus example: instead of writing

lowRelative =
#(define-music-function (mus) (ly:music?)
  #{ \relative c,,, $mus #})

you can write

lowRelative = \relative c,,, \etc

HTH, Simon